聚醚类破乳剂的扩链与支化改性  

MODIFYING DEMULSIFIER BY CHAIN EXPANDING AND BRANCHING METHODS

作　　者：徐家业[1] 马希斐[1] 陈仕佳[1] 陈世军[1] 

机构地区：[1]西安石油大学化学化工学院,陕西西安710065

出　　处：《石油学报（石油加工）》2007年第2期99-103,共5页Acta Petrolei Sinica(Petroleum Processing Section)

摘　　要：B61聚醚用己二酸扩链引入羧基官能团,然后用三乙撑四胺、D-山梨醇、D-木糖、季戊四醇等对扩链产物进行支化,合成了若干扩链支化型破乳剂。测定它们的相对分子质量和相关官能团,分析其性能与结构的关系;测定改性产物的界面张力,分析界面张力与破乳性能间的关系。结果表明,B61聚醚经扩链后,对某些原油的破乳能力有所提高,破乳能力与界面张力间有一定的相关性,但无明显的对应关系;扩链破乳剂支化后破乳能力进一步增强,多胺类支化剂优于多元醇支化剂。Several new modified demulsifiers were synthesized by the chain expending and branching of polyether B61. The chain expending was carried out by the reaction of polyether B61 with adipic acid to introduce the carboxyl group in the B61 molecule. Then the branching was carried out by the reaction of the chain expending resultant with triethylenetretramine, D-sorbic alcohol, D-xylose, pentaerythrite and so on, respectively. The relative molecular masses of chain expending products were determined through the method of terminal analysis to see the relation between the molecular structure and their properties. The interracial tensions of the new modified demulsifiers were measured to see the relation between the interracial tension and demulsification. The results of demulsification tests indicated that the demulsifying ability of B61 polyether for crude oil was enhanced obviously after chain expending and branching, and for the crude oil demulsification expending and branching product was better than the only chain expending product. As the branching agent, polyamines showed better modification than polyalcohols. It was shown that there exists some relationship between the demulsifying ability and the interracial tension.

关 键 词：破乳剂 扩链 支化 

分 类 号：TQ326.5[化学工程—合成树脂塑料工业] O632.3[理学—高分子化学]